ORA-00279 signalled during ...

[Arjen Visser]

When I look at the alert log for the standby databases, I see the following message frequently:
Media Recovery Log /u01/oradata/standbyarchdest/arch_1_97.arc
ORA-00279 signalled during: ALTER DATABASE RECOVER LOGFILE /u01/oradata/st..

The ORA-279 is normal and expected behaviour. It is the message generated by Oracle to indicate that recovery of the standby database is taking place.